1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
laila [671]
3 years ago
9

A nebula is composed of dust and gas, but what are the elements in a nebula?

Biology
1 answer:
raketka [301]3 years ago
8 0
Nebulae are made of dust and gases—mostly hydrogen and helium. ... Eventually, the clump of dust and gas gets so big that it collapses from its own gravity. The collapse causes the material at the center of the cloud to heat up-and this hot core is the beginning of a star.



Hope this helps !
You might be interested in
Water can move from the hydrosphere to the what through the process of evaporation
Lerok [7]
Atmosphere so D i think lol hope this helped :)!
4 0
4 years ago
What happens when an overgrowth of algae dies?
gayaneshka [121]
More oxygen becomes available in the water helping the marine or freshwater creatures live. <span />
7 0
3 years ago
Que significa formulacion de frutas
Snezhnost [94]

Answer:

Fruit in formulations allows unparalleled versatility, functioning as either a main ingredient, an inclusion, a flavorant, or as a healthful sweetener.

7 0
3 years ago
Making an analogy between hearing and vision, the auditory hair cells in the_____ are similar to the _____ in the _____
TiliK225 [7]

Answer;

-Cochlea; rods and cones; retina

Making an analogy between hearing and vision, the auditory hair cells in the cochlea are similar to the rods and cones in the retina.

Explanation;

-There are two types of photoreceptors in the human retina, rods and cones.  Rods are responsible for vision at low light levels (scotopic vision). They do not mediate color vision, and have a low spatial acuity.

-Cones are active at higher light levels (photopic vision), are capable of color vision and are responsible for high spatial acuity. The central fovea is populated exclusively by cones.

The cochlea is a portion of the inner ear that looks like a snail shell. It receives sound in the form of vibrations, which cause the stereocilia to move. The stereocilia then convert these vibrations into nerve impulses which are taken up to the brain to be interpreted.

7 0
3 years ago
Read 2 more answers
After a copper smelter begins operation, local populations of plants downwind of the plant begin to adapt to the resulting air p
Katen [24]

Answer:

e) directional selection

Explanation:

Directional Selection:

  • The type of natural selection that favors one of the extremes of the phenotype spectrum, shifting the allele frequency to one direction
  • This type of selection selects against intermediate and one of the extreme phenotypes.
  • In this particular case, the increasing pollution has pushed the plants to evolve better acid tolerance.
  • This indicates that if the environmental conditions worsen, only the acid tolerant plants will be able to survive.

* Another example is illustrated in the image. The graph shows the shifts in allele frequency.

7 0
3 years ago
Read 2 more answers
Other questions:
  • What are the various tranport phenomena in living plants and animals
    8·1 answer
  • Which country imports the most metals? A.Africa B.Japan C.Australia D.Russia
    5·2 answers
  • Mary loved having her own garden and would often spend many hours tending to its care. She was meticulous in watering the plants
    12·1 answer
  • Most organisms cannot live in temperatures: <br> a: above 0°C <br> b: above 50°C <br> c: below 50°C
    15·2 answers
  • Is Tay-sachs dominant or a recessive disorder??
    13·1 answer
  • Glucose enters the epithelial cells of the small intestine against its concentration gradient. Select the BEST explanation from
    8·1 answer
  • What type of bird is this
    10·1 answer
  • 2) List one way viruses can be helpful.
    6·2 answers
  • As a sound wave travels, what happens to the particles in the medium it travels through
    13·2 answers
  • 4. historical Method
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!